EP3802119A1 - Laminated filtering structure - Google Patents

Laminated filtering structure

Info

Publication number
EP3802119A1
EP3802119A1 EP19737184.2A EP19737184A EP3802119A1 EP 3802119 A1 EP3802119 A1 EP 3802119A1 EP 19737184 A EP19737184 A EP 19737184A EP 3802119 A1 EP3802119 A1 EP 3802119A1
Authority
EP
European Patent Office
Prior art keywords
laminated structure
sheet
blades
structure according
slatted
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP19737184.2A
Other languages
German (de)
French (fr)
Inventor
Keihann Yavari
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saint Gobain Glass France SAS
Compagnie de Saint Gobain SA
Original Assignee
Saint Gobain Glass France SAS
Compagnie de Saint Gobain SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Saint Gobain Glass France SAS, Compagnie de Saint Gobain SA filed Critical Saint Gobain Glass France SAS
Publication of EP3802119A1 publication Critical patent/EP3802119A1/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • B32B17/10036—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10293—Edge features, e.g. inserts or holes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10431—Specific parts for the modulation of light incorporated into the laminated safety glass or glazing
    • B32B17/1044—Invariable transmission
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B32B17/10614—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer comprising particles for purposes other than dyeing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B32B17/10651—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer comprising colorants, e.g. dyes or pigments
    • B32B17/1066—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer comprising colorants, e.g. dyes or pigments imparting a tint in certain regions only, i.e. shade band
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B32B17/10761—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer containing vinyl acetal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J1/00—Windows; Windscreens; Accessories therefor
    • B60J1/001—Double glazing for vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J3/00—Antiglare equipment associated with windows or windscreens; Sun visors for vehicles
    • B60J3/007—Sunglare reduction by coatings, interposed foils in laminar windows, or permanent screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/44—Number of layers variable across the laminate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/412—Transparent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2313/00—Elements other than metals
    • B32B2313/04—Carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2315/00—Other materials containing non-metallic inorganic compounds not provided for in groups B32B2311/00 - B32B2313/04
    • B32B2315/08—Glass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2419/00—Buildings or parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • B32B2605/08—Cars

Definitions

  • the invention relates to a laminated structure, in particular a windshield, which has a capacity for selective and directional filtration of a part of the light radiation, in particular solar radiation, which passes through it.
  • automobile windshields are obtained from a laminated structure, that is to say from a composite structure in which two sheets of glass are intimately connected to each other by a spacer.
  • plastic material usually consisting of one or more polyvinyl butyral (PVB) films.
  • the object of the present invention is to propose such a solution.
  • the present invention relates in the first place to a laminated structure, comprising two sheets of glass, one of which is an outer and one inner, interconnected by an interlayer consisting of at least one layer of a plastic material, said first outer sheet defining an outer surface of said structure and said second glass sheet defining an inner surface of said structure, said structure being characterized in that it further comprises, between the two glass sheets, a slit sheet selectively filtering the light rays incident on at least a portion of the outer surface of said structure, said sheet having a louvre angle of between 15 ° and 75 ° relative to the normal to the outer surface of said structure.
  • the slatted sheet comprises and preferably consists of a succession of transmissive blades and absorbent blades of the incident light.
  • the blades alternate preferably parallel to the length of the sheet (which corresponds to the horizontal width of the laminated structure).
  • the blades are continuous from one edge to the other of the sheet (and preferably of the laminated structure). More preferably, they extend from the outer surface to the inner surface of said leaflet.
  • the sheet according to the invention advantageously allows to selectively filter towards the inner surface the light rays incident on at least a portion of the outer surface of said structure.
  • the sheet having a louvre angle has comprised between 25 ° and 65 °, more preferably between 30 ° and 60 °, with respect to the normal to the outer surface of said structure.
  • the slatted sheet is encapsulated in the plastic material forming the interlayer.
  • the slatted sheet constitutes all or part of the interlayer.
  • the slatted sheet has a thickness of between 0.1 mm and 0.5 mm.
  • the material constituting the absorbent regions incorporates particles of carbon black.
  • the pitch between two successive transmissive regions is between 3 and 200 microns, more preferably between 5 and 100 microns, even between 10 and 80 microns and very preferably between 20 and 60 microns.
  • transmissive and absorbent regions are blades arranged substantially parallel to each other and oriented at a louvre angle of between 15 ° between 75 °, preferably between 25 ° and 65 °, or between 30 ° and 60 ° , relative to the normal to the outer surface of said structure.
  • the thickness of the absorbent blades is between 1 and 70 microns, preferably between 3 and 40 microns, more preferably 5 and 20 microns.
  • the thickness of the transmissive blades is between 2 and 130 microns, preferably between 7 and 80 microns, more preferably 10 and 30 microns.
  • the thickness of the transmissive blades is greater than the thickness of the absorbent blades, preferably by a factor greater than or equal to 1.5.
  • the pitch between two transmissive blades is between 0.5 times and 5 times the thickness of the sheet.
  • the invention particularly relates to a windshield constituted by or comprising a laminated structure as described above.
  • the slatted sheet can be present only in the upper third of said structure, or only in the upper quarter of said structure.
  • the invention relates to a roof window, in particular housing, constituted by or comprising a laminated structure as described above.
  • the invention relates to a sunroof and / or panoramic, comprising a laminated structure as described above.
  • the louvre angle may be less than 15 °, for example less than 10 ° or even less than 5 °, or even substantially zero.
  • Fig. 1 illustrates a schematic view of a slit sheet selectively filtering incident light rays, i.e. incident sunlight as may be used in a structure according to the present invention.
  • FIG. 2 shows the use of a laminated structure according to the invention, here in the form of a laminated windshield incorporating a slatted leaflet as described in FIG.
  • Figure 3 shows in more detail a sectional view of a structure of the laminated windshield of Figure 2 and in particular illustrates the operation and advantages of such a structure.
  • Figure 1 there is shown a typical structure of a slatted sheet ("louver film” according to the Anglo-Saxon term commonly used in the art) whose technology and materials are well known, for example US publications 8,503,122, US 8,213,082, US 5,254,388 EP0563241, WO2007 / 118122, EP 1501696, or US 6,924,912. These structures are for example used as a screen cover for computer screens, so that only the person substantially positioned in front of the screen can see the information on it.
  • a slatted sheet (louver film” according to the Anglo-Saxon term commonly used in the art) whose technology and materials are well known, for example US publications 8,503,122, US 8,213,082, US 5,254,388 EP0563241, WO2007 / 118122, EP 1501696, or US 6,924,912.
  • These structures are for example used as a screen cover for computer screens, so that only the person substantially positioned in front of the screen can see the information on it.
  • regions or absorbent blades 2 of the incident radiation alternate with transmissive regions or blades 3 for this same radiation, that is to say which allows the radiation to pass through. incident light.
  • regions or absorbent blades 2 of the incident radiation alternate with transmissive regions or blades 3 for this same radiation, that is to say which allows the radiation to pass through. incident light.
  • regions are in the form of blades.
  • blade is understood to mean a structure of substantially constant thickness over its entire width and length.
  • the blades according to the invention extend over the entire thickness and preferably over the entire length of the slatted sheet in which they are incorporated.
  • the transmissive regions or blades 3 may consist of a second plastic material, identical to or different from the previous one, and furthermore comprise carbon black or any absorbent material all or part of the visible light.
  • the absorbent blades 2 and the transmissive blades 3 alternate, with a louvre angle ⁇ ("angle" according to the Anglo-Saxon term) between 15 and 80 °, preferably between 25 and 65 °, relative to the normal 14 to the outer surface of the sheet (and therefore the laminated structure incorporating it), for reasons which will be explained later in connection with Figures 2 and 3.
  • a louvre angle ⁇ (“angle” according to the Anglo-Saxon term) between 15 and 80 °, preferably between 25 and 65 °, relative to the normal 14 to the outer surface of the sheet (and therefore the laminated structure incorporating it), for reasons which will be explained later in connection with Figures 2 and 3.
  • the thickness of the absorbent and transmissive blades is constant and their spacing is regular.
  • the inclination combined with the spacing between the two regions also makes it possible to adjust the opening angle Q ("cut-off angle" according to the Anglo-Saxon term) for the incident light, according to a mode of operation and filtration similar to that obtained for ventaux a louver.
  • FIG. 2 shows a possible and advantageous use of a laminated structure according to the invention, here in the form of a laminated windshield 4 which incorporates a slatted sheet 1 configured to select in its part high a part of the radiation of the incident light.
  • the slatted sheet is present only in the upper third of said structure, or only in the upper quarter of said structure.
  • Upper third or upper quarter means the portion of the windscreen whose surface is one third or one quarter of the total area of the windscreen, starting from the upper edge of the windscreen as positioned in the vehicle and in accordance with longitudinal direction.
  • the windshield 4 is configured to select a part of the radiation of the incident light, so as firstly to avoid excessive illumination of the conductor, while at the same time maintaining a high level of brightness inside the cabin and in particular for the passengers sitting at the rear of the vehicle.
  • the same numbers have been used to designate identical elements or of the same nature.
  • the sheetlet 1 inserted in the upper part 5 of the windshield 4 allows selective filtration of the sunlight incident on the windshield.
  • the glazing is at an angle g obtus with the ground, for example between 15 and 40 °, or even lower.
  • this flat surface is represented in FIGS. 2 and 3, but it is of course possible and even frequent that this surface 5, like the windshield 4 as a whole, is curved.
  • FIG. 3 is shown in greater detail an example of the upper part 5 of the laminated structure 4 according to the invention and its action on three light rays. , having a substantially vertical incidence (symbolized by the arrow 6), a substantially horizontal incidence (symbolized by the arrow 8) and an oblique incidence (symbolized by the arrow 7), relative to the ground.
  • the windshield described in FIG. 3 has a conventional laminated structure 4 of such a structure: two glass sheets, one inner 10 and the other outer 9, are interconnected by a spacer 11, generally polyvinylbutyral (PVB).
  • a spacer 11 generally polyvinylbutyral (PVB).
  • PVB polyvinylbutyral
  • the windshield presents in this region an angle g which can vary between 25 and 40 ° with the horizontal.
  • the slatted sheet 1 is configured in such a way that the substantially vertical and substantially horizontal radii 8 are totally or partially absorbed by an absorbent region 2 of the windshield, whereas the radius 7 arrives on the windshield in accordance with a oblique incidence passes through this one substantially without absorption towards the inner surface 13 of the windshield part and the rear of the passenger compartment.
  • This provides a blackout or partially obscuring leaf for the driver of the vehicle, especially when the sun is directly above the windshield, while maintaining a significant light in the passenger compartment of the vehicle.
  • the angle Q can be adjusted to values between 20 and 50 ° to obtain a sufficiently wide range allowing a very strong illumination of the passenger compartment, whatever the position of the sun above the vehicle.
  • the angle g between the windshield and the horizontal is generally between 15 and 40 °.
  • the value of the angle of louvre a is generally adjusted so as to let a maximum of light rays directed towards the rear of the passenger compartment and to stop at least partially, or in whole or almost all, the solar radiation coming directly from the sun when it is close to its maximum height, that is to say directly above the vehicle, and directed towards the driver (that is to say substantially along the vertical radius 6 ).
  • the windshield can of course have a curvature in the area where is incorporated the slatted sheet.
  • the principles described above remain of course the same as those described above.
  • the slatted sheet may form all or part of the interlayer present between the two glass sheets constituting the laminated structure.
  • the laminated structure is an automobile windshield. It is of course also possible to use the laminated structure described in the following claims in other applications, such as roof window. Such roof windows are positioned on the roof at an angle to the horizontal to substantially respect the plane of the roof. In such a case also, the use of a slipped sheet has the same advantages as previously described, without being repeated here for brevity.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Joining Of Glass To Other Materials (AREA)
  • Laminated Bodies (AREA)

Abstract

Disclosed is a laminated structure, comprising two glass sheets (9, 10), an outer and an inner one, that are joined together by an interlayer (11) consisting of at least one layer of a plastic material, the outer, first sheet delimiting an outer surface (12) of the structure and the second glass sheet delimiting an inner surface (13) of the structure, the structure being characterised in that it further comprises, between the two glass sheets, a louvre-type film (1) that selectively filters towards the inner surface light rays incident on at least one segment of the outer surface of the structure, the film having a louvre angle α of between 15° and 75° with respect to the normal (14) to the outer surface of the structure.

Description

STRUCTURE FEUILLETEE FILTRANTE  FILTERED SHEET STRUCTURE
L’invention se rapporte à une structure feuilletée, en particulier un pare- brise, qui possède une capacité de filtration sélective et directionnelle d’une partie du rayonnement lumineux, en particulier solaire, qui la traverse. The invention relates to a laminated structure, in particular a windshield, which has a capacity for selective and directional filtration of a part of the light radiation, in particular solar radiation, which passes through it.
A l’heure actuelle, les pare-brises automobiles sont obtenus à partir d’une structure feuilletée, c'est-à-dire à partir d’une structure composite dans laquelle deux feuilles de verre sont liées intimement entre elle par un intercalaire en matière plastique, le plus souvent constitué d’un ou plusieurs films de polyvinylbutyral (PVB). At present, automobile windshields are obtained from a laminated structure, that is to say from a composite structure in which two sheets of glass are intimately connected to each other by a spacer. plastic material, usually consisting of one or more polyvinyl butyral (PVB) films.
En outre, on a pu constater sur les véhicules récents une tendance à maximiser les parties vitrées entourant l’habitacle du véhicule, de façon à offrir à ses occupants une vision panoramique à 360°.  In addition, recent vehicles have shown a tendency to maximize the glass parts surrounding the vehicle interior, so as to offer its occupants a 360 ° panoramic view.
Egalement, dans une telle optique, de nouveaux pare-brises ont été développés, dont la surface est très supérieure aux pare-brises classiques, notamment par une extension du vitrage pour recouvrir une partie du toit du véhicule. Ainsi, il est courant aujourd’hui que les pare-brises se prolongent dans leur partie supérieure jusqu’au-dessus de la tête du conducteur, voire même au-delà.  Also, in such an optics, new windshields have been developed, the surface of which is much greater than conventional windshields, in particular by extending the glazing to cover part of the roof of the vehicle. Thus, it is common today that the windshields extend in their upper part to above the driver's head, or even beyond.
Si une telle configuration permet effectivement d’assurer une luminosité et une vision maximale de l’environnement du véhicule depuis l’intérieur de celui-ci, elle pose cependant le problème de l’éblouissement du conducteur notamment sous de fortes insolations.  If such a configuration makes it possible to ensure a brightness and a maximum vision of the environment of the vehicle from inside it, however, it poses the problem of dazzling the driver especially under strong sunstroke.
En particulier, lorsque le soleil est à son zénith ou proche de celui-ci et face au conducteur, le rayonnement intense arrivant directement dans ses yeux représente une gêne intense pour le conducteur. Pour pallier ce problème, il est prévu le plus souvent un panneau coulissant ou dépliable venant recouvrir la partie supérieure du pare-brise. Cependant, lorsque ce panneau est en position occultante, la portion « transparente » du vitrage devient beaucoup plus réduite et la luminosité diminue à l’intérieur de l’habitacle, notamment pour les passagers assis sur les places arrières du véhicule. En outre, l’utilisation de pare-brises de grande taille du type décrit précédemment entraîne des reflets accrus de lumière sur le tableau de bord. In particular, when the sun is at or near its zenith and facing the driver, the intense radiation arriving directly in his eyes represents an intense discomfort for the driver. To overcome this problem, it is expected most often a sliding or foldable panel from covering the upper part of the windshield. However, when this panel is in the blackout position, the "transparent" portion of the glazing becomes much smaller and the brightness decreases inside the passenger compartment, especially for passengers sitting in the rear seats of the vehicle. In addition, the use of large windshields of the type described above leads to increased reflections of light on the dashboard.
Il existe ainsi aujourd’hui pour de telles surfaces vitrées un besoin pour une solution qui permette de limiter l’éblouissement du conducteur sous de forts ensoleillements tout en maintenant un niveau de luminosité élevé dans le reste de l’habitacle, notamment à l’arrière du véhicule et en particulier une bonne visibilité de l’extérieur avant par les passagers.  Today, there is a need for such glazed surfaces for a solution that makes it possible to limit the glare of the driver under strong sunshine while maintaining a high level of brightness in the rest of the passenger compartment, particularly at the rear. of the vehicle and in particular a good visibility of the outside front by the passengers.
L’objet de la présente invention est de proposer une telle solution.  The object of the present invention is to propose such a solution.
Plus précisément, la présente invention concerne en premier lieu une structure feuilletée, comprenant deux feuilles de verre, dont une extérieure et une intérieure, liées entre elles par un intercalaire constitué d’au moins une couche d’une matière plastique, ladite première feuille extérieure définissant une surface extérieure de ladite structure et ladite seconde feuille de verre définissant une surface intérieure de ladite structure, ladite structure étant caractérisée en ce qu’elle comprend en outre, entre les deux feuilles de verre, un feuillet à claire-voie filtrant sélectivement les rayons lumineux incidents sur au moins une portion de la surface extérieure de ladite structure, ledit feuillet présentant un angle de claire-voie a compris entre 15° et 75° par rapport à la normale à la surface extérieure de ladite structure.  More specifically, the present invention relates in the first place to a laminated structure, comprising two sheets of glass, one of which is an outer and one inner, interconnected by an interlayer consisting of at least one layer of a plastic material, said first outer sheet defining an outer surface of said structure and said second glass sheet defining an inner surface of said structure, said structure being characterized in that it further comprises, between the two glass sheets, a slit sheet selectively filtering the light rays incident on at least a portion of the outer surface of said structure, said sheet having a louvre angle of between 15 ° and 75 ° relative to the normal to the outer surface of said structure.
Selon l’invention le feuillet à claire-voie comprend et de préférence est constitué par une succession de lames transmissives et de lames absorbantes de la lumière incidente. Selon l’invention les lames alternent de préférence parallèlement à la longueur du feuillet (qui correspond à la largeur horizontale de la structure feuilletée).  According to the invention the slatted sheet comprises and preferably consists of a succession of transmissive blades and absorbent blades of the incident light. According to the invention the blades alternate preferably parallel to the length of the sheet (which corresponds to the horizontal width of the laminated structure).
De préférence les lames sont continues d’un bord à l’autre du feuillet (et de préférence de la structure feuilletée). De préférence encore, elles s’étendent depuis la surface extérieure jusqu’à la surface intérieure dudit feuillet.  Preferably the blades are continuous from one edge to the other of the sheet (and preferably of the laminated structure). More preferably, they extend from the outer surface to the inner surface of said leaflet.
Le feuillet selon l’invention permet avantageusement de filtrer sélectivement vers la surface intérieure les rayons lumineux incidents sur au moins une portion de la surface extérieure de ladite structure.  The sheet according to the invention advantageously allows to selectively filter towards the inner surface the light rays incident on at least a portion of the outer surface of said structure.
Selon des modes de réalisation préférés de la présente invention, qui peuvent le cas échéant être combinés entre eux : - Le feuillet présentant un angle de claire-voie a compris entre 25° et 65°, de préférence encore compris entre 30° et 60°, par rapport à la normale à la surface extérieure de ladite structure. According to preferred embodiments of the present invention, which may optionally be combined with each other: The sheet having a louvre angle has comprised between 25 ° and 65 °, more preferably between 30 ° and 60 °, with respect to the normal to the outer surface of said structure.
- Le feuillet à claire-voie est encapsulée dans la matière plastique formant l’intercalaire.  - The slatted sheet is encapsulated in the plastic material forming the interlayer.
- Le feuillet à claire-voie constitue tout ou partie de l’intercalaire.  - The slatted sheet constitutes all or part of the interlayer.
- Le feuillet à claire-voie a une épaisseur comprise entre 0,1 mm et 0,5 mm. - The slatted sheet has a thickness of between 0.1 mm and 0.5 mm.
- Le matériau constituant les régions absorbantes incorpore des particules de noir de carbone. The material constituting the absorbent regions incorporates particles of carbon black.
- Le pas entre deux régions transmissives successives est compris entre 3 et 200 micromètres, de préférence encore est compris entre 5 et 100 micromètres, voire entre 10 et 80 micromètres et de manière très préférée est compris entre 20 et 60 micromètres.  The pitch between two successive transmissive regions is between 3 and 200 microns, more preferably between 5 and 100 microns, even between 10 and 80 microns and very preferably between 20 and 60 microns.
- Lesdites régions transmissives et absorbantes sont des lames disposées sensiblement parallèlement entre elles et orientées selon un angle de claire-voie a compris entre 15° entre 75°, de préférence compris entre 25° et 65°, voire compris entre 30° et 60°, par rapport à la normale à la surface extérieure de ladite structure.  - Said transmissive and absorbent regions are blades arranged substantially parallel to each other and oriented at a louvre angle of between 15 ° between 75 °, preferably between 25 ° and 65 °, or between 30 ° and 60 ° , relative to the normal to the outer surface of said structure.
- L’épaisseur des lames absorbantes est comprise entre 1 et 70 micromètres, de préférence entre 3 et 40 micromètres, de préférence encore 5 et 20 micromètres.  - The thickness of the absorbent blades is between 1 and 70 microns, preferably between 3 and 40 microns, more preferably 5 and 20 microns.
- L’épaisseur des lames transmissives est comprise entre 2 et 130 micromètres, de préférence entre 7 et 80 micromètres, de préférence encore 10 et 30 micromètres.  - The thickness of the transmissive blades is between 2 and 130 microns, preferably between 7 and 80 microns, more preferably 10 and 30 microns.
- L’épaisseur des lames transmissives est supérieure à l’épaisseur des lames absorbantes, de préférence d’un facteur supérieur ou égal à 1 ,5. The thickness of the transmissive blades is greater than the thickness of the absorbent blades, preferably by a factor greater than or equal to 1.5.
- Le pas entre deux lames transmissives est compris entre 0,5 fois et 5 fois l’épaisseur du feuillet. - The pitch between two transmissive blades is between 0.5 times and 5 times the thickness of the sheet.
L’invention concerne tout particulièrement un pare-brise constitué par ou comprenant une structure feuilletée telle que décrite précédemment. Selon une telle réalisation, le feuillet à claire-voie peut être présent uniquement dans le tiers supérieur de ladite structure, voire uniquement dans le quart supérieur de ladite structure. The invention particularly relates to a windshield constituted by or comprising a laminated structure as described above. According to such an embodiment, the slatted sheet can be present only in the upper third of said structure, or only in the upper quarter of said structure.
Selon une autre réalisation, l’invention se rapporte à une fenêtre de toit, en particulier d’habitation, constituée par ou comprenant une structure feuilletée telle que décrite précédemment. According to another embodiment, the invention relates to a roof window, in particular housing, constituted by or comprising a laminated structure as described above.
Selon une réalisation alternative, l’invention se rapporte à un toit ouvrant et/ou panoramique, comprenant une structure feuilletée telle que décrite précédemment. Dans une telle réalisation, l’angle de claire-voie peut être inférieur à 15°, par exemple inférieur à 10° ou même inférieur à 5°, voire sensiblement nul. According to an alternative embodiment, the invention relates to a sunroof and / or panoramic, comprising a laminated structure as described above. In such an embodiment, the louvre angle may be less than 15 °, for example less than 10 ° or even less than 5 °, or even substantially zero.
Un mode de réalisation non limitatif de la présente invention est décrit ci- après en relation avec les figures annexées, étant entendu que les différents aspects décrits dans celui-ci ne doivent pas être considérés comme limitatifs de la présente invention. A non-limiting embodiment of the present invention is described below in connection with the accompanying figures, it being understood that the various aspects described therein should not be considered as limiting of the present invention.
La figure 1 illustre une vue schématique d’un feuillet à claire-voie filtrant sélectivement les rayons lumineux incidents, c'est-à-dire la lumière solaire incidente tel qu’il peut être utilisé dans une structure selon la présente invention.  Fig. 1 illustrates a schematic view of a slit sheet selectively filtering incident light rays, i.e. incident sunlight as may be used in a structure according to the present invention.
La figure 2 permet de visualiser l’utilisation d’une structure feuilletée selon l’invention, ici sous la forme d’un pare-brise feuilleté qui incorpore un feuillet à claire-voie tel que décrit sur la figure 1.  FIG. 2 shows the use of a laminated structure according to the invention, here in the form of a laminated windshield incorporating a slatted leaflet as described in FIG.
La figure 3 montre plus en détail une coupe d’une structure du pare-brise feuilleté de la figure 2 et en particulier illustre le fonctionnement et les avantages d’une telle structure.  Figure 3 shows in more detail a sectional view of a structure of the laminated windshield of Figure 2 and in particular illustrates the operation and advantages of such a structure.
Sur la figure 1 , on a représenté une structure typique d’un feuillet à claire-voie (« louver film » selon le terme anglo-saxon habituellement utilisé dans la technique) dont la technologie et les matériaux utilisés sont bien connues, par exemple des publications US 8,503,122, US 8,213,082, US 5,254,388 EP0563241 , W02007/1 18122, EP 1501696, ou encore US 6,924,912. Ces structures sont par exemple utilisées comme cache écran pour les écrans d’ordinateurs, de telle façon que seule la personne sensiblement positionnée en face de l’écran puisse voir les informations sur celui-ci. In Figure 1, there is shown a typical structure of a slatted sheet ("louver film" according to the Anglo-Saxon term commonly used in the art) whose technology and materials are well known, for example US publications 8,503,122, US 8,213,082, US 5,254,388 EP0563241, WO2007 / 118122, EP 1501696, or US 6,924,912. These structures are for example used as a screen cover for computer screens, so that only the person substantially positioned in front of the screen can see the information on it.
Dans un exemple de réalisation d’un tel feuillet, des régions ou lames absorbantes 2 du rayonnement incident (le rayonnement du soleil) alternent avec des régions ou lames transmissives 3 pour ce même rayonnement, c'est- à-dire qui laisse passer la lumière incidente. Ces régions sont sous forme de lames. Au sens de la présente invention, on entend notamment par « lame » une structure d’épaisseur sensiblement constante sur toute sa largeur et toute sa longueur.  In an exemplary embodiment of such a sheet, regions or absorbent blades 2 of the incident radiation (the radiation of the sun) alternate with transmissive regions or blades 3 for this same radiation, that is to say which allows the radiation to pass through. incident light. These regions are in the form of blades. For the purposes of the present invention, the term "blade" is understood to mean a structure of substantially constant thickness over its entire width and length.
De préférence, selon l’invention, dans la région de la structure feuilletée dans laquelle elles sont présentes, les lames selon l’invention s’étendent sur toute l’épaisseur et de préférence encore sur toute la longueur du feuillet à claire-voie dans lequel elles sont incorporées. Par exemple, et sans que cela puisse être considéré comme limitatif de la présente invention, les régions ou lames transmissives 3 peuvent être constituées d’une seconde matière plastique, identique ou différente de la précédente, et comprendre en outre du noir de carbone ou tout matériau absorbant tout ou partie de la lumière visible.  Preferably, according to the invention, in the region of the laminated structure in which they are present, the blades according to the invention extend over the entire thickness and preferably over the entire length of the slatted sheet in which they are incorporated. For example, and without this being considered as limiting of the present invention, the transmissive regions or blades 3 may consist of a second plastic material, identical to or different from the previous one, and furthermore comprise carbon black or any absorbent material all or part of the visible light.
Selon la présente invention, les lames absorbantes 2 et les lames transmissives 3 alternent, avec un angle de claire-voie a (« louver angle » selon le terme anglo-saxon) compris entre 15 et 80°, de préférence compris entre 25 et 65°, par rapport à la normale 14 à la surface extérieure du feuillet (et donc de la structure feuilletée l’incorporant), pour des raisons qui seront expliquées par la suite en relation avec les figures 2 et 3.  According to the present invention, the absorbent blades 2 and the transmissive blades 3 alternate, with a louvre angle α ("angle" according to the Anglo-Saxon term) between 15 and 80 °, preferably between 25 and 65 °, relative to the normal 14 to the outer surface of the sheet (and therefore the laminated structure incorporating it), for reasons which will be explained later in connection with Figures 2 and 3.
Selon l’invention, l’épaisseur des lames absorbantes et transmissives est constante et leur espacement est régulier. L’inclinaison combinée avec l’espacement entre les deux régions permet en outre d’ajuster l’angle d’ouverture Q (« cut-off angle » selon le terme anglo-saxon) pour la lumière incidente, selon un mode de fonctionnement et de filtration similaire à celui obtenu pour des ventaux d’une persienne. Sur la figure 2, on a représenté une utilisation possible et avantageuse d’une structure feuilletée selon l’invention, ici sous la forme d’un pare-brise feuilleté 4 qui incorpore un feuillet à claire-voie 1 configuré pour sélectionner dans sa partie haute 5 une partie du rayonnement de la lumière incidente. Par exemple, le feuillet à claire-voie est présent uniquement dans le tiers supérieur de ladite structure, voire uniquement dans le quart supérieur de ladite structure. On entend par tiers supérieur ou quart supérieur la portion du pare-brise dont la surface représente le tiers ou le quart de la surface totale du pare-brise, en partant du bord supérieur du pare-brise tel que positionné dans le véhicule et selon une direction longitudinale. According to the invention, the thickness of the absorbent and transmissive blades is constant and their spacing is regular. The inclination combined with the spacing between the two regions also makes it possible to adjust the opening angle Q ("cut-off angle" according to the Anglo-Saxon term) for the incident light, according to a mode of operation and filtration similar to that obtained for ventaux a louver. FIG. 2 shows a possible and advantageous use of a laminated structure according to the invention, here in the form of a laminated windshield 4 which incorporates a slatted sheet 1 configured to select in its part high a part of the radiation of the incident light. For example, the slatted sheet is present only in the upper third of said structure, or only in the upper quarter of said structure. Upper third or upper quarter means the portion of the windscreen whose surface is one third or one quarter of the total area of the windscreen, starting from the upper edge of the windscreen as positioned in the vehicle and in accordance with longitudinal direction.
Comme indiqué précédemment en relation avec le problème technique sous-jacent à la présente invention, le pare-brise 4 est configuré pour sélectionner une partie du rayonnement de la lumière incidente, de manière d’une part à éviter une trop forte illumination du conducteur, tout en préservant d’autre part un fort niveau de luminosité à l’intérieur de l’habitacle et en particulier pour les passagers assis à l’arrière du véhicule. Dans toutes les figures, les mêmes numéros ont été utilisés pour désigner des éléments identiques ou de même nature.  As indicated above in connection with the technical problem underlying the present invention, the windshield 4 is configured to select a part of the radiation of the incident light, so as firstly to avoid excessive illumination of the conductor, while at the same time maintaining a high level of brightness inside the cabin and in particular for the passengers sitting at the rear of the vehicle. In all the figures, the same numbers have been used to designate identical elements or of the same nature.
Comme indiqué sur la figure 2, le feuillet à claire-voie 1 inséré dans la partie haute 5 du pare-brise 4 permet une filtration sélective de la lumière solaire incidente sur le pare-brise. Dans cette partie haute, le vitrage fait un angle g obtus avec le sol, par exemple compris entre 15 et 40°, voire même inférieur. Pour des raisons de simplification, on a représenté cette surface plane sur les figures 2 et 3 mais il est bien entendu possible voire fréquent que cette surface 5, tout comme le pare-brise 4 dans son ensemble, soit bombée.  As indicated in FIG. 2, the sheetlet 1 inserted in the upper part 5 of the windshield 4 allows selective filtration of the sunlight incident on the windshield. In this upper part, the glazing is at an angle g obtus with the ground, for example between 15 and 40 °, or even lower. For reasons of simplification, this flat surface is represented in FIGS. 2 and 3, but it is of course possible and even frequent that this surface 5, like the windshield 4 as a whole, is curved.
Selon un avantage lié à la mise en oeuvre de la présente invention, seuls les rayons lumineux arrivant selon un angle d’incidence déterminé traversent le pare-brise. On peut ainsi définir, selon une configuration donnée des régions absorbantes et transmissives, notamment sous forme de lames, un angle d’ouverture Q (ou angle de cut-off) et ajuster l’axe central 15 de celui-ci, comme indiqué sur les figures 2 et 3, de manière à sélectionner spécifiquement le rayonnement vers une position de l’habitacle, en particulier vers les passagers arrière, tout en préservant le conducteur d’une trop forte insolation. According to an advantage related to the implementation of the present invention, only the light rays arriving at a given angle of incidence pass through the windshield. It is thus possible to define, according to a given configuration of the absorbing and transmissive regions, in particular in the form of blades, an opening angle Q (or cut-off angle) and to adjust the central axis thereof as indicated on FIG. FIGS. 2 and 3, so as to specifically select the radiation to a position of the passenger compartment, in particular to the rear passengers, while preserving the driver from too much sunshine.
La mise en oeuvre de la présente invention et ses avantages sont illustrés plus en détails sur la figure 3 dans laquelle on a représenté plus en détail un exemple la partie haute 5 de la structure feuilletée 4 selon l’invention et son action sur trois rayons lumineux, présentant une incidence sensiblement verticale (symbolisé par la flèche 6), une incidence sensiblement horizontale (symbolisé par la flèche 8) et une incidence oblique (symbolisé par la flèche 7), par rapport au sol.  The implementation of the present invention and its advantages are illustrated in more detail in FIG. 3, in which is shown in greater detail an example of the upper part 5 of the laminated structure 4 according to the invention and its action on three light rays. , having a substantially vertical incidence (symbolized by the arrow 6), a substantially horizontal incidence (symbolized by the arrow 8) and an oblique incidence (symbolized by the arrow 7), relative to the ground.
Le pare-brise décrit sur la figure 3 présente une structure feuilletée classique 4 d’une telle structure : deux feuilles de verre, l’une intérieure 10 et l’autre extérieure 9, sont liées entre elle par un intercalaire 1 1 , généralement en polyvinylbutyral (PVB). Dans la partie haute 5 du pare-brise, tout particulièrement dans la portion du pare-brise surplombant le conducteur dans le véhicule, on dispose un feuillet à claire-voie tel que décrit précédemment en relation avec la figure 1. Le pare-brise présente dans cette région un angle g qui peut varier entre 25 et 40° avec l’horizontale. Le feuillet à claire-voie 1 est configuré de telle façon que les rayons sensiblement vertical 6 et sensiblement horizontal 8 soient absorbés totalement ou partiellement par une région absorbante 2 du pare-brise, tandis que le rayon 7 arrivant sur le pare-brise selon une incidence oblique traverse celui-ci substantiellement sans absorption vers la surface intérieure 13 du pare-brise partie et l’arrière de l’habitacle. On obtient ainsi un feuillet occultant ou partiellement occultant pour le conducteur du véhicule, notamment lorsque le soleil est à l’aplomb du pare-brise, tout en préservant une lumière importante dans l’habitacle du véhicule.  The windshield described in FIG. 3 has a conventional laminated structure 4 of such a structure: two glass sheets, one inner 10 and the other outer 9, are interconnected by a spacer 11, generally polyvinylbutyral (PVB). In the upper part 5 of the windshield, particularly in the portion of the windshield overlooking the driver in the vehicle, there is a slider as described above in connection with Figure 1. The windshield presents in this region an angle g which can vary between 25 and 40 ° with the horizontal. The slatted sheet 1 is configured in such a way that the substantially vertical and substantially horizontal radii 8 are totally or partially absorbed by an absorbent region 2 of the windshield, whereas the radius 7 arrives on the windshield in accordance with a oblique incidence passes through this one substantially without absorption towards the inner surface 13 of the windshield part and the rear of the passenger compartment. This provides a blackout or partially obscuring leaf for the driver of the vehicle, especially when the sun is directly above the windshield, while maintaining a significant light in the passenger compartment of the vehicle.
Par exemple, on pourra très facilement ajuster l’angle de cut-off Q en ajustant l’épaisseur respective et l’écartement entre les régions absorbantes et les régions transmittives. Selon l’invention, l’angle Q peut être ajusté à des valeurs comprises entre 20 et 50° pour obtenir une plage suffisamment large permettant une très forte illumination de l’habitacle, quelle que soit la position du soleil au-dessus du véhicule. Dans la partie supérieure du vitrage où est positionné le feuillet à claire-voie, l’angle g entre le pare-brise et l’horizontale est en général compris entre 15 et 40°. For example, it will be very easy to adjust the cut-off angle Q by adjusting the respective thickness and spacing between the absorbing regions and the transmitting regions. According to the invention, the angle Q can be adjusted to values between 20 and 50 ° to obtain a sufficiently wide range allowing a very strong illumination of the passenger compartment, whatever the position of the sun above the vehicle. In the upper part of the glazing where is positioned the slatted leaf, the angle g between the windshield and the horizontal is generally between 15 and 40 °.
La valeur de l’angle de claire-voie a est en général ajustée de manière à laisser passer un maximum des rayons lumineux dirigés vers l’arrière de l’habitacle et à stopper au moins partiellement, voire en totalité ou en quasi totalité, le rayonnement solaire issu directement du soleil lorsque celui-ci est proche de sa hauteur maximale, c'est-à-dire à l’aplomb du véhicule, et dirigés vers le conducteur (c'est-à-dire sensiblement selon le rayon vertical 6).  The value of the angle of louvre a is generally adjusted so as to let a maximum of light rays directed towards the rear of the passenger compartment and to stop at least partially, or in whole or almost all, the solar radiation coming directly from the sun when it is close to its maximum height, that is to say directly above the vehicle, and directed towards the driver (that is to say substantially along the vertical radius 6 ).
Selon la présente invention, le pare-brise peut bien entendu présenter une courbure dans la zone où est incorporé le feuillet à claire-voie. Les principes décrits plus haut restent bien entendu les même que ceux décrits précédemment.  According to the present invention, the windshield can of course have a curvature in the area where is incorporated the slatted sheet. The principles described above remain of course the same as those described above.
Selon un autre mode de réalisation de l’invention non illustré par des schémas, le feuillet à claire-voie peut former tout ou partie de l’intercalaire présent entre les deux feuilles de verre constitutifs de la structure feuilletée.  According to another embodiment of the invention not illustrated by diagrams, the slatted sheet may form all or part of the interlayer present between the two glass sheets constituting the laminated structure.
L’invention vient d’être décrite en relation avec un mode de réalisation dans lequel la structure feuilletée est un pare-brise automobile. Il est bien entendu également possible d’utiliser la structure feuilletée décrite dans les revendications qui suivent dans d’autres applications, notamment comme fenêtre de toit. De telles fenêtres de toit sont positionnées sur le toit selon un angle par rapport à l’horizontale pour respecter sensiblement le plan de la toiture. Dans un tel cas également, l’utilisation d’un feuillet à claire-voie présente les mêmes avantages que précédemment décrits, sans qu’ils soient ici répétés pour des questions de concision. The invention has just been described in connection with an embodiment in which the laminated structure is an automobile windshield. It is of course also possible to use the laminated structure described in the following claims in other applications, such as roof window. Such roof windows are positioned on the roof at an angle to the horizontal to substantially respect the plane of the roof. In such a case also, the use of a slipped sheet has the same advantages as previously described, without being repeated here for brevity.

Claims

REVENDICATIONS
1. Structure feuilletée, comprenant deux feuilles de verre (9, 10), dont une extérieure et une intérieure, liées entre elles par un intercalaire (1 1 ) constitué d’au moins une couche d’une matière plastique, ladite première feuille extérieure délimitant une surface extérieure (12) de ladite structure et ladite seconde feuille de verre délimitant une surface intérieure (13) de ladite structure, ladite structure étant caractérisée en ce qu’elle comprend en outre, entre les deux feuilles de verre, un feuillet à claire-voie (1 ), ledit feuillet (1 ) présentant un angle de claire-voie a compris entre 15° et 75° par rapport à la normale (14) à la surface extérieure (12) de ladite structure, le feuillet à claire-voie comprenant une alternance de lames transmissives (3) et de lames absorbantes (2) de la lumière incidente (6, 7, 8) disposées parallèlement entre elles. 1. A laminated structure comprising two glass sheets (9, 10), one of which is outer and one inner, interconnected by an interlayer (1 1) consisting of at least one layer of a plastic material, said first outer sheet defining an outer surface (12) of said structure and said second glass sheet delimiting an inner surface (13) of said structure, said structure being characterized in that it further comprises, between the two sheets of glass, a sheet with louvre (1), said sheet (1) having a louvre angle of between 15 ° and 75 ° relative to the normal (14) to the outer surface (12) of said structure, the clear sheet channel comprising alternating transmissive blades (3) and absorbing blades (2) of the incident light (6, 7, 8) arranged parallel to one another.
2. Structure feuilletée selon la revendication 1 , dans laquelle ledit feuillet présentant un angle de claire-voie a compris entre 25° et 65° par rapport à la normale (14) à la surface extérieure de ladite structure. The laminated structure of claim 1, wherein said sheet having a louvre angle has comprised between 25 ° and 65 ° to the normal (14) on the outer surface of said structure.
3. Structure feuilletée selon l’une des revendications précédentes, dans laquelle le feuillet à claire-voie (1 ) est encapsulée dans la matière plastique formant l’intercalaire (1 1 ). 3. laminated structure according to one of the preceding claims, wherein the slatted sheet (1) is encapsulated in the plastic material forming the spacer (1 1).
4. Structure feuilletée selon l’une des revendications 1 à 3, dans laquelle le feuillet à claire-voie (1 ) constitue tout ou partie de l’intercalaire (1 1 ). 4. laminated structure according to one of claims 1 to 3, wherein the slatted sheet (1) constitutes all or part of the insert (1 1).
5. Structure feuilletée selon l’une des revendications précédentes, dans laquelle le feuillet à claire-voie a une épaisseur comprise entre 0,1 mm et 0,5 mm. 5. laminated structure according to one of the preceding claims, wherein the slatted sheet has a thickness of between 0.1 mm and 0.5 mm.
6. Structure feuilletée selon l’une des revendications précédentes, dans laquelle le feuillet à claire-voie est constitué par une alternance de lames transmissives (3) et de lames absorbantes (2) de la lumière incidente (6, 7, 8) depuis la surface extérieure (12) vers la surface intérieure (13) de ladite structure. 6. laminated structure according to one of the preceding claims, wherein the slatted sheet is constituted by an alternation of blades transmissive (3) and absorbent blades (2) of the incident light (6, 7, 8) from the outer surface (12) to the inner surface (13) of said structure.
7. Structure feuilletée selon l’une des revendications précédentes, dans laquelle le pas entre deux régions transmissives successives est compris entre 3 et 200 micromètres. 7. laminated structure according to one of the preceding claims, wherein the pitch between two successive transmissive regions is between 3 and 200 microns.
8. Structure feuilletée selon l’une des revendications précédentes, dans laquelle le matériau constituant les lames absorbantes contient des particules de noir de carbone. 8. laminated structure according to one of the preceding claims, wherein the material constituting the absorbent blades contains carbon black particles.
9. Structure feuilletée selon l’une des revendications précédentes, dans laquelle lesdites lames transmissives et absorbantes sont disposées sensiblement parallèlement entre elles et orientées selon un angle de claire-voie a compris entre 15° entre 75° par rapport à la normale (14) à la surface extérieure de ladite structure. 9. laminated structure according to one of the preceding claims, wherein said transmissive and absorbent blades are arranged substantially parallel to each other and oriented at a louvre angle of between 15 ° between 75 ° relative to the normal (14) on the outer surface of said structure.
10. Structure feuilletée selon l’une des revendications précédentes, dans laquelle l’épaisseur des lames absorbantes est comprise entre 1 et 70 micromètres. 10. Laminated structure according to one of the preceding claims, wherein the thickness of the absorbent blades is between 1 and 70 microns.
1 1. Structure feuilletée selon l’une des revendications précédentes, dans laquelle l’épaisseur des lames absorbantes est comprise entre 2 et 130 micromètres. 1. Laminated structure according to one of the preceding claims, wherein the thickness of the absorbent blades is between 2 and 130 micrometers.
12. Structure feuilletée selon l’une des revendications selon l’une des revendications précédentes, dans laquelle l’épaisseur des lames transmissives et supérieure à l’épaisseur des lames absorbantes, de préférence d’un facteur supérieur ou égal à 1 ,5. 12. A laminated structure according to one of claims according to one of the preceding claims, wherein the thickness of the transmissive blades and greater than the thickness of the absorbent blades, preferably a factor greater than or equal to 1, 5.
13. Pare-brise (4) constitué par ou comprenant une structure feuilletée selon l’une des revendications précédentes. 13. Windscreen (4) constituted by or comprising a laminated structure according to one of the preceding claims.
14. Pare-brise (4) selon la revendication précédente, dans lequel le feuillet à claire-voie est présent uniquement dans le tiers supérieur de ladite structure, voire uniquement dans le quart supérieur de ladite structure. 14. Windscreen (4) according to the preceding claim, wherein the slatted leaf is present only in the upper third of said structure, or only in the upper quarter of said structure.
15. Fenêtre de toit, en particulier d’un bâtiment ou d’une habitation, constitué par ou comprenant une structure feuilletée selon l’une des revendications 1 à 12. 15. Roof window, in particular a building or a dwelling, constituted by or comprising a laminated structure according to one of claims 1 to 12.
16. Toit ouvrant et/ou panoramique, comprenant une structure feuilletée selon l’une des revendications 1 à 12. 16. Sunroof and / or panoramic roof, comprising a laminated structure according to one of claims 1 to 12.
EP19737184.2A 2018-05-31 2019-05-29 Laminated filtering structure Pending EP3802119A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1854717A FR3081769B1 (en) 2018-05-31 2018-05-31 LAMINATED FILTERING STRUCTURE
PCT/FR2019/051283 WO2019229395A1 (en) 2018-05-31 2019-05-29 Laminated filtering structure

Publications (1)

Publication Number Publication Date
EP3802119A1 true EP3802119A1 (en) 2021-04-14

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EP19737184.2A Pending EP3802119A1 (en) 2018-05-31 2019-05-29 Laminated filtering structure

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US (1) US20210187911A1 (en)
EP (1) EP3802119A1 (en)
CN (1) CN112203848A (en)
FR (1) FR3081769B1 (en)
MX (1) MX2020012558A (en)
WO (1) WO2019229395A1 (en)

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US3524789A (en) * 1967-08-15 1970-08-18 Minnesota Mining & Mfg Louvered transparent sheeting made by skiving
US3922440A (en) * 1974-08-16 1975-11-25 Minnesota Mining & Mfg Safety glass light control medium
US5104210A (en) * 1989-04-24 1992-04-14 Monsanto Company Light control films and method of making
US5254388A (en) 1990-12-21 1993-10-19 Minnesota Mining And Manufacturing Company Light control film with reduced ghost images
CA2098833C (en) 1990-12-21 2002-02-19 Sanford Cobb Jr. Light control film with reduced ghost images
JP2003294952A (en) 2002-03-29 2003-10-15 Denso Corp Hologram screen
US6905219B2 (en) * 2002-05-09 2005-06-14 3M Innovative Properties Company Display device
JP2004341272A (en) * 2003-05-16 2004-12-02 Nissan Motor Co Ltd Angle-selective transmissive reflecting material and laminated glass for vehicle using same
BE1016540A3 (en) * 2005-03-10 2007-01-09 Glaverbel Automotive glass selective distribution.
JP2007279424A (en) 2006-04-07 2007-10-25 Three M Innovative Properties Co Privacy filter sheet and display device containing the same
CN101903809B (en) 2007-12-21 2012-02-29 3M创新有限公司 Light control film
JP6120481B2 (en) 2009-02-06 2017-04-26 スリーエム イノベイティブ プロパティズ カンパニー Light control film and multilayer optical film stack
EP3034296A1 (en) * 2014-12-19 2016-06-22 AGC Glass Europe Laminated glazing
JP2017068104A (en) * 2015-09-30 2017-04-06 大日本印刷株式会社 Lighting sheet, lighting panel and building

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CN112203848A (en) 2021-01-08
FR3081769A1 (en) 2019-12-06
US20210187911A1 (en) 2021-06-24
WO2019229395A1 (en) 2019-12-05
MX2020012558A (en) 2021-01-29
FR3081769B1 (en) 2023-04-28

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